Journals
- Daichi Amagata and Takahiro Hara.
Efficient Density-Peaks Clustering Algorithms on Static and Dynamic Data in Euclidean Space
ACM Transactions on Knowledge Discovery from Data (TKDD), volume 18, number 1, pages 2:1-2:27, 2024.
Extended version of SIGMOD2021.
Codes are here and here.
- Daichi Amagata and Takahiro Hara.
Reverse Maximum Inner Product Search: Formulation, Algorithms, and Analysis
ACM Transactions on the WEB (TWEB), volume 17, number 4, pages 26:1-26:23, 2023.
Extended version of RecSys2021.
Code is here.
- Kohei Hirata, Daichi Amagata, Sumio Fujita, and Takahiro Hara.
Categorical Diversity-Aware Inner Product Search
IEEE Access, volume 11, pages 2586-2596, 2023.
Code is here.
- Kohei Hirata, Daichi Amagata, and Takahiro Hara.
Cardinality Estimation in Inner Product Space
IEEE Open Journal of the Computer Society, volume 3, pages 208-216, 2022.
Code is here.
- Zhi Li, Daichi Amagata, Yihong Zhang, Takuya Maekawa, Takahiro Hara, Kei Yonekawa, and Mori Kurokawa.
HML4Rec: Hierarchical Meta-Learning for Cold-Start Recommendation in Flash Sale E-commerce
Knowledge-based Systems, volume 255, pages 109674, 2022.
- Ryosuke Taniguchi, Daichi Amagata, and Takahiro Hara.
Efficient Retrieval of Top-k Weighted Triangles on Static and Dynamic Spatial Data
IEEE Access, volume 10, pages 55298-55307, 2022.
Extended version of DASFAA2022.
- Daichi Amagata, Makoto Onizuka, and Takahiro Hara.
Fast, Exact, and Parallel-friendly Outlier Detection Algorithms with Proximity Graph in Metric Spaces
The VLDB Journal, volume 31, number 4, pages 797-821, 2022.
Extended version of SIGMOD2021.
Code is here.
- Shunya Nishio, Daichi Amagata, and Takahiro Hara.
Lamps: Location-Aware Moving Top-k Pub/Sub
IEEE Transactions on Knowledge and Data Engineering (TKDE), volume 34, number 1, pages 352-364, 2022.
- Yiming Tian, Takuya Maekawa, Joseph Korpela, Daichi Amagata, Takahiro Hara, Sakiko Matsumoto, and Ken Yoda.
Automatic Identification of Differences in Behavioral Co-occurrence between Groups
Animal Biotelemetry, volume 9, number 21, 2021.
- Hanxin Wang, Daichi Amagata, Takuya Maekawa, Takahiro Hara, Kei Yonekawa, Hao Niu, and Mori Kurokawa.
A DNN-based Cross-Domain Recommender System for Alleviating Cold-Start Problem in E-commerce
IEEE Open Journal of the Industrial Electronics Society, pages 194-206, 2020.
Extended version of ECNLP2019.
- Boqi Gao, Takuya Maekawa, Daichi Amagata, and Takahiro Hara.
Detecting Reinforcement Learning-Based Grey Hole Attack in Mobile Wireless Sensor Networks
IEICE Transaction on Communications, E103-B, number 5, May 2020.
- Thilina Madushan Dissanayake, Takuya Maekawa, Daichi Amagata, and Takahiro Hara.
Detecting Door Events Using a Smartphone via Active Sound Sensing
Proceedings of the ACM on Interactive, Mobile, Wearable and Ubiquitous Technologies, volume 2, number 4, pages 160:1-160:26, December 2018.
- Daichi Amagata, Takahiro Hara, and Makoto Onizuka.
Space Filling Approach for Distributed Processing of Top-k Dominating Queries
IEEE Transactions on Knowledge and Data Engineering (TKDE), volume 30, number 6, pages 1150-1163, June 2018.
- Shuhei Hayashida, Daichi Amagata, Takahiro Hara, and Xing Xie.
Dummy Generation Based on User-Movement Estimation for Location Privacy Protection
IEEE Access, volume 6, pages 22958-22969, April 2018.
- Daichi Amagata and Takahiro Hara.
Mining Top-k Co-Occurrence Patterns across Multiple Streams
IEEE Transactions on Knowledge and Data Engineering (TKDE), volume 29, number 10, pages 2249-2262, October 2017.
- Daichi Amagata, Takahiro Hara, Yuya Sasaki, and Shojiro Nishio.
Efficient Cluster-Based Top-k Query Routing with Data Replication in MANETs
Soft Computing, volume 21, number 15, pages 4161-4178, August 2017.
Extended version of MoMM2014.
- Daichi Amagata and Takahiro Hara.
A General Framework for MaxRS and MaxCRS Monitoring in Spatial Data Streams
ACM Transactions on Spatial Algorithms and Systems (TSAS), volume 3, number 1, pages 1-34, May 2017.
Extended version of EDBT2016.
- Daichi Amagata, Takahiro Hara, and Shojiro Nishio.
Sliding Window Top-k Dominating Query Processing over Distributed Data Streams
Distributed and Parallel Databases, volume 34, number 4, pages 535-566, December 2016.
- Daichi Amagata, Yuya Sasaki, Takahiro Hara, and Shojiro Nishio.
Efficient Processing of Top-k Dominating Queries in Distributed Environments
World Wide Web, volume 19, number 4, pages 545-577, July 2016.